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Drill rod centralizing ring and drilling device for horizontal drilling

A drilling device and horizontal drilling technology, which is applied in the direction of drill pipes, drilling equipment and methods, and drill pipes, and can solve the problems that the drill pipe cannot be centered closely, the mud circulation effect in the hole is not good, and the drilling pressure loss, etc. problem, to achieve the effect of good circulation effect, good promotion significance, and loss reduction

Pending Publication Date: 2021-07-13
CHINA RAILWAY ERYUAN ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: in the process of horizontal directional drilling in the prior art, the drill pipe cannot be centered close to the wall of the lower hole, resulting in serious loss of drilling pressure transmitted by the drilling rig to the drill bit in the rock and soil, and the circulation effect of the mud in the hole Bad problem, to provide a drill pipe centralizing ring for horizontal drilling, the drill pipe centralizing ring can overcome the influence of gravity on the drill pipe, so that the drill pipe is centered to avoid close contact with the borehole wall, reducing drilling pressure on the rock The loss in the soil, and the circulation effect of the mud in the hole is good

Method used

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  • Drill rod centralizing ring and drilling device for horizontal drilling
  • Drill rod centralizing ring and drilling device for horizontal drilling
  • Drill rod centralizing ring and drilling device for horizontal drilling

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Experimental program
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Effect test

Embodiment 1

[0054] Such as figure 1 and figure 2 As shown, a drill pipe centering ring 1 includes an inner ring 11 and an outer ring 12 arranged concentrically. There are three connecting pedestals 111 connected therebetween, and the connecting pedestals 111 are evenly spaced along the circumferential direction of the inner ring 11 . The gap area formed between the inner ring 11 and the outer ring 12 is a mud circulation channel 121 . Such as figure 1 As shown, the drill pipe centralizing ring 1 includes a first centralizing body 14 and a second centralizing body 15 arranged symmetrically. The first centralizing body 14 and the second centralizing body 15 are two symmetrical rings, which are fixed by screws 13 after being combined. Drill pipe centralizing ring 1, the matching connecting surface of the first centralizing body 14 and the second centralizing body 15 is the cross section of the drill pipe centralizing ring 1, the first centralizing body 14 and the second centralizing body...

Embodiment 2

[0061] A drilling device for horizontal drilling, comprising a drill bit, a drill pipe 2 and two spaced drill pipe centering rings 1 shown in Embodiment 1 which are set and fixed on the drill pipe 2, the drill bit is installed on the drill pipe end of rod 2. Such as Figure 4 As shown in the schematic diagram of the structural relationship between the drill pipe 2 and the drill pipe centralizing ring 1, the drill pipe centralizing ring 1 is sleeved on the drill pipe 2 and is fixedly connected by a pin key 113. The drilling device provided by the present invention can be used for surveying small-diameter Long-distance directional horizontal drilling operations have good promotional significance.

Embodiment 3

[0063] This embodiment provides the installation steps of the drilling device of Embodiment 2, including the following steps:

[0064] Step A. Install the drill pipe centralizing ring 1: first place three movable steel balls 122 in sequence in the cavity connecting the pedestal 111 of the second centralizing body 15, and then place the first centralizing body 14 symmetrically on the second centralizing body 15 First, fix the first centralizer 14 and the second centralizer 15 with screws, and then install mud filter screens 1112 at the two ends of the cavity 1111 connected along the circumferential direction of the outer ring;

[0065] Step B, then the drill pipe 2 is passed through the inner ring 11 of the drill pipe centralizing ring 1; the pin key 113 is inserted into the pin key groove 112 of the inner ring 11, the two ends of the pin key groove 112 all leak out the pin key 113, Then the screw is inserted into the threaded hole provided on the outer leaking pin key at the t...

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Abstract

The invention relates to a drill rod centralizing ring and a drilling device for horizontal drilling. The drill rod centralizing ring comprises an inner ring and an outer ring which are concentrically arranged, the cross section of the inner ring and the cross section of the outer ring are in a circular ring shape, and the inner ring is used for fixedly sleeving a drill rod; two or more connecting pedestals are arranged between the inner ring and the outer ring at intervals, one end of each connecting pedestal is connected with the outer wall of the inner ring, and the other end of each connecting pedestal is connected with the inner wall of the outer ring. In the drilling process, the drill rod is lifted to the middle position, the situation that the drill rod is tightly attached to the wall of a drilled hole is avoided, the loss of drilling pressure in rock soil is reduced, meanwhile, and a channel is formed in the gap area between the outer ring and the inner ring, so that the circulation effect of slurry in the hole is good; the drilling device can be used for exploring small-caliber long-distance directional horizontal drilling operation, good popularization significance is realized.

Description

technical field [0001] The invention relates to the technical field of drill pipe centralizing rings, in particular to a drill pipe centralizing ring and a drilling device for horizontal drilling. Background technique [0002] Affected by problems such as high altitude, complex geological conditions, difficult transportation of drilling rigs, or difficult drilling, traditional vertical drilling technology cannot accurately complete regional surveys, and the survey results are not ideal. Horizontal drilling survey technology has obvious application advantages in such complex high-altitude areas. At the two ends of the tunnel at the foot of the mountain, direct drilling survey using horizontal orientation has attracted extensive attention. [0003] In the process of horizontal directional drilling, the diameter of the drill pipe is smaller than the diameter of the drill bit, and there is a certain annular gap between the drill pipe and the borehole. The annular space is mainly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10E21B7/04E21B21/00
CPCE21B17/1078E21B7/046E21B21/002
Inventor 陈明浩韦猛张羽军彭家洛郑明明周学军朱泳标刘建国王彦东霍宇翔李谦
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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